DEPARTMENT OF SEISMOTECTONICS

Seismic, resistivity and gravimetric

data acquisition and analysis for near-

surface studies (geotechnical applica-

tions, environmental monitoring, ar-

chaeological studies, geological map-

ping, seismic-hazard evaluation etc.)

Evaluation of possible Earthquake

precursors in the light of Global tec-

tonics theories

Paleoseismological evaluation of

fault structures

MAIN RESEARCH SUBJECTS

Joint analysis of surface waves ac-

cording to advanced procedures

(acquisition and inversion of multi-

component data)

Brittle tectonics and paleostress

analyses

Probabilistic seismic hazard analysis

Analysis of microseismicity caused

by hydraulic fracturing for uncon-

ventional resources and geothermal

energy

THEMATIC RESEARCH FOCUS

NEAR SURFACE AND CRUSTAL EXPLORATION

VIA SEISMIC, GRAVIMETRIC AND RESISTIVITY

DATA

MONITORING AND ANALYSIS OF NATURAL

AND INDUCED MICROSEISMICITY

IMPLEMENTAION OF NOVEL TECHINQUES

AND DEVICES FOR GEOPHYSICAL DATA

ANALYSIS AND ACQUISITION WITH SPECIAL

EMPHASIS ON SEISMICS

ACTIVE TECTONICSAcquiring geoelectrical data in the vicinity of the Temelín nuclear power plant

INSTITUTE OF ROCK STRUCTURE AND MECHANICS of the Czech Academy of Sciences

Monitoring of fl uid-induced micro-

seismicity and its risk assessment

Application and interpretation of

seismic (surface and body) waves in

a broad range of frequencies and

scales (from near surface applica-

tions up to crustal studies)

Analysis of earthquake, moment

tensor inversion

Prototyping novel sensors and devi-

ces for the acquisition of seismic data

KEY RESEARCH EQUIPMENTS

Geode 24-channel Seismograph (Geometrics)

Seismic equipment for continuous monitoring

- RUP2012/SeisComP

4 Permanent Seismic Stations for Czech Regional Seismic

Network (CzechGeo/EPOS)

5 Permanent Small Aperture Seismic Arrays

CG-5 Gravity Meter

ARES geoelectric apparatus

Geophone SM6-3D (ION Geophysical Corporation)

Seismometer CMG-40T (Guralp Systems)

Seismometer STS-2 (Streckeisen)

Rotaphones

The Rotaphone: prototype of the seismic rotational sensor system and generator of rotational movements.

Geophysics is carried out anywhere and at any time. Seismic moni-toring in the Třeboň Basin.

Optimized acquisition of data for the joint analysis of the Horizon-tal-to-Vertical Spectral Ratio (HVSR) and the Miniature Array Analy-sis of Microtremors (MAAM), aimed at defi ning the Rayleigh-wave phase-velocity dispersion curve.

Testing of Rotapfone in USGS laboratory in Albu-querque, New Mexico, USA. Special rotary shock table facilitates a detailed deter-mination of the Rotaphone parameters.

ACHIEVEMENTS Microseismic monitoring, Induced

SeismicityAnikiev D., Valenta J., Staněk, F. Eisner L., 2014. Joint location and source mechanism inver-sion of microseismic events: benchmarking on seismicity induced by hydraulic fracturing. Geo-phys. J. Int, 198, 249-258.

Benetatos Ch., Málek J., Verga F., 2013: Moment tensor inversion for two micro-earthquakes oc-curring inside the Haje gas storage facilities, Czech Republic. Journal of Seismology, 17, 557-577.

Clarke H., Eisner L., Styles P., Turner P., 2014. Felt seismicity associated with shale gas hydrau-lic fracturing: The fi rst documented example in Europe. Geophys. Res. Lett., 41.

Kolínský P., Valenta J., Gaždová R., 2012. Seis-micity, groundwater level variations and Earth tides in the Hronov-Poříčí Fault Zone, Czech Re-public. Acta Geodynamica et Geomaterialia, 9, 191-209.

Nováková L., 2010. Detailed brittle tectonic analysis of the limestones in the quarries near Vápenná village. Acta Geodynamica et Geo-materialia, 7, 167-174.

Nováková L., Sosna K., Brož M., Najser J., Novák P., 2011. Geomechanical parametres of the podlesí granites and its relationship to seismic velocities. Acta Geodynamica et Geomaterialia, 8, 353–369

Nováková L., 2014. Evolution of paleostress fi elds and brittle deformation in Hronov-Poříčí Fault Zone, Bohemian Massif. Studia Geophysi-ca et Geodeatica. 58, 269-288.

Štrunc J., Brož M., 2011. The detection of weak earthquakes in the western bohemian swarm area through the deployment of seismic arrays. Acta Geodynamica et Geomaterialia, 8, 469–477.

Meteories and Earthquake predictionBorovička J., Spurný P., Brown P., Wiegert P., Kalenda P., Clark D., Shrbený L., 2013: The tra-jectory, structure and origin of the Chelyabinsk asteroidal impactor. Nature, 503, 235–237.

Borovička J., Tóth, J., Igaz, A., Spurný, P., Kalen-da, P., Haloda, J., Svoreň, J., Kornoš L., Silber, E.,

Nový Kostel Small Aperture Array

3D reconstruction of the Zebín volcano by means of DC resistivity tomography.

Eisner L., Gei D., Hallo M., Opršal I., Ali M., 2013. The peak frequency of direct waves for micro-seismic events. Geophysics, 78, A45–A49.

Opršal I, Eisner L., 2014. Cross-correlation - an objective tool to indicate induced seismicity. Geophysical. Journal International, 196, 1536-1543.

Staněk F., Eisner L., Moser T. J., 2014. Stability of source mechanisms inverted from P-wave am-plitude microseismic monitoring data acquired at surface. Geophysical Prospecting, 62, 475–490.

Seismicity, tectonics and paleostress analysis

Brokešová J., Málek J., 2013. Rotaphone, a Self-Calibrated Six-Degree-of-Freedom Seis-mic Sensor and Its Strong-Motion Records. Seis-mological Research Letters, 84, 737-744.

Fojtíková L., Zahradník J., 2014. A new strat-egy for weak events in sparse networks: the fi rst-motion polarity solutions constrained by single-station waveform inversion. Seismologi-cal Research Letters, 85, 1265-1274.

Hartvich F., Valenta J., 2013. Tracing an intra-montane fault: an interdisciplinary approach. Surveys in Geophysics, 34, 317–347.

Pavel Kalenda while installing a pendulum in the Magdalena cave (part of Postojna cave system – Slovenia).

Leo Eisner in the Savuka mine (South Africa), 3.7 km underground.

Location of microseismic event (ML-0.2 and its mechanisms agrees with the subsequent-ly identifi ed fault plane, both in special place-ment as well as in orientation of the fault.

Brown, P., Husárik, M., 2013. The Košice meteor-ite fall: Atmospheric trajectory, fragmentation, and orbit. Meteoritics and Planetary Science 1–23.

Kalenda P., Holub K., Rušajová J., Nuemann L., 2013. Microseisms and spreading of deforma-tion waves around the globe. NCGT, 1, 38-57.

Kalenda P., Neumann L., Málek J., Skalský L., Procházka V., Ostřihanský L., Kopf T., Wandrol I., 2012. Tilts, global tectonics and earthquake prediction. SWB, London, 247pp.

The holistic (joint) inversion of the FVS inversion of the ZVF and RVF group-velocity spectra jointly with the RVSR (Radial-to-Vertical Spectral Ratio): a) model distribution in the three-objective space (reported as misfi ts for the three considered objective functions); b) VS profi les for the „best models“ (green area represents the adopted search space); c) and d) the group-velocity spectra for the vertical and radial components (background colours the fi eld data, overlaying contour lines the synthetic); e) observed and synthetic RVSR.

MAIN COLLABORATING PARTNERS– Academy of Sciences of the Czech

Republic - Geophysical Institute; Geological Institute (Prague, CZ)

– AGH (Krakow, Poland)

– Arcadis Geotechnika a.s. (Prague, CZ)

– Czech Geological Survey (Prague, CZ)

– Cuadrilla Resources, (Birmingham, UK)

– Charles University in Prague, Faculty of Science (CZ)

– Charles University in Prague, Faculty of Mathematics and Physics (Prague, CZ)

– Czech Technical University in Prague, Faculty of Electrical Engineering (Prague, CZ)

– Eötvös University in Budapest (Hungary)

– Isatech, Ltd. (Prague, CZ)

– MicroSeismic, Inc. (Texas, USA)

– New Mexico Highlands University (Las Vegas, USA)

– Petroleum Institute, (Abu Dhabi, United Arab Emirates)

– National Academy of Sciences of Ukraine, (Lvov, Ukraine)

– NORSAR (Norway)

– Karst Research Institute, Scientifi c Research Centre of the Slovenian Academy of Science and Art(Postojna, Ljubljana, Slovenia)

– OGS Trieste (Italy)

– Palivový Kombinát Ústí, Státní Podnik, (Ústí Nad Labem, CZ)

– Polish Academy of Sciences (Poland)

– Seismik s.r.o. (Prague, CZ)

– Stanford University (USA)

– Slovak Academy of Sciences - Geophysical Institute (Slovakia)

– Slovmag Lubeník a.s., (Slovakia)

– United States Geological Survey (USA)

– University of Stuttgart, Institute of Geophysics (Germany)

Department of Seismotectonics

V Holešovičkach 41182 09 Praha 8Czech Republicwww.irsm.cas.cz/ seismotectonics

Dr. Giancarlo Dal MoroHead of Deparment E-mail: dalmoro@irsm.cas.cz Phone: +420 266 009 301

INSTITUTE OF ROCK STRUCTURE AND MECHANICS of the Czech Academy of Sciences

Crustal studiesKnapmeyer-Endrun B., Krüger F., Legendre C. P., Geissler W.H., Plomerová J., Babuška V., Gaždová R., Jedlička P., Kolínský P., Málek J., Novotný O., Růžek B., 2013. Tracing the infl u-ence of the Trans-European Suture Zone into the mantle transition zone. Earth and Planetary Sci-ence Letters, 363, 73-87.

Kolínský P., Málek J., Brokešová J., 2011. Shear wave crustal velocity model of the Western Bo-hemian Massif from Love wave phase velocity dispersion. Journal of Seismology,15, 81-104.

Kolínský P., Valenta J., Málek J., 2014. Velocity model of the Hronov-Poříčí Fault Zone from Rayleigh wave dispersion. Journal of Seismol-ogy, 18, 617-635.

Skácelová Z., Rapprich V., Valenta J., Hartvich F., Šrámek J., Radoň M., Gaždová R., Nováková L., Pécskay Z., 2010. Geophysical research on struc-ture of partly eroded maar volcanoes: Miocene

An earthquake in the Corinth Gulf, Greece. Comparison of the performance of two methods for the determination of the focal mechanism: on the left the classical fi rst-motion polarity (the uncertainty of the focal mechanism is quite large); on the right panel: our six CSPS solutions (Fojtikova and Zahradnik, 2014) obtained by using polari-ties and waveform inversion of individual stations.

A quarry near Vapenna village, Rychleby Mts., Czech Republic (Devonian crystalline limes-tones of the Branna group): Mineral accretion calcite steps (mineral fi bres displayed on the fault plane in the fi gure) as commonly used slickenside indicators. In this fi gure they are identifying right lateral movement along the fault plane. This outcrop is located at GPS coordinates: N50°16‘41‘‘, E017°05‘32‘‘.

N50°32‘14“, E016°02‘31“: this locality is uni-que for its clear establishment and apparent view of the fault. The outcrop exposes one of the main faults of the active Hronov-Poří-čí Fault Zone, Czech Republic.

Building of local seismic network REYKJANES in Iceland

aHnojnice and Oligocene Rychnov volcanoes (northern Czech Republic). Journal of Geo-sciences, 55, 4, 299–310.

Near surface geophysicsBrokešová J., Málek J., Kolínský, P., 2012. Rota-phone, a mechanical seismic sensor system for fi eld rotation rate measurements and its in situ calibration. Journal of Seismology 16, 603-621.

Brokešová J., Málek J., Evans J. R., 2012. Rota-phone, a new self-calibrated six-degree-of-free-dom seismic sensor. Review of Scientifi c Instru-ments, 83, 8.

Dal Moro G., 2014. Surface Wave Analysis for Near Surface Applications, Elsevier, ISBN 978-0-12-800770-9, 252pp.

Gaždová R., Kolínský P., Vilhelm J., Valenta J., 2014. Combining surface waves and com-mon methods for shallow geophysical survey. Near Surface Geophysics, doi: 10.3997/1873-0604.2014039.

Gaždová R., Vilhelm J., 2011. DISECA – A Mat-lab code for dispersive waveform calculations. Computers and Geotechnics, 38, 526–531.